wok annotate pixman/description.txt @ rev 17992

Add few descriptions (from pkgs.org)
author Aleksej Bobylev <al.bobylev@gmail.com>
date Thu Apr 23 16:47:39 2015 +0300 (2015-04-23)
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al@17992 1 A library for manipulating pixel regions -- a set of Y-X banded rectangles,
al@17992 2 image compositing using the Porter/Duff model and implicit mask generation for
al@17992 3 geometric primitives including trapezoids, triangles, and rectangles.